All-cause mortality risk for older men dropped 17% for each additional 30 minutes of light exercise, such as walking or gardening, performed each day, researchers reported in the British Journal of Sports Medicine. Sporadic exercise reduced mortality risk by 41%, while exercising 10 minutes or more lowered the risk by 42%.

Late-night talk show host Tavis Smiley is suing PBS after sexual misconduct allegations led to his firing. Smiley has denied his behavior created a "verbally abusive and threatening environment" for women and says the network used the accusations as an excuse to force him out.

The US Department of Education is seeking public comment around forgiving loans for students claiming "undue hardship." The move comes as several Democratic lawmakers have introduced legislation that would allow students to discharge federal loans during a bankruptcy.

Walmart shares posted their biggest drop in three decades after the company reported disappointing online sales and weak earnings. As the stock price plunged more than 10%, several widely followed equity indexes were dragged down.

About 57% of Costco members are also Amazon Prime members, compared to 13% five years ago, according to a survey from MoffettNathanson. "Americans appear to be buying into the concept of owning two 'shopping' memberships as the value proposition is fundamentally different," the firm wrote in a research note.

A study by Google and Alphabet unit Verily Life Sciences published in the journal Nature Biomedical Engineering found that high blood pressure or the risk of stroke or heart attack may be predicted by analyzing retinal image scans using Google's intricate pattern-recognizing algorithms, or neural networks. However, the technique, which was performed on more than 280,000 patients across the UK and the US, had an accuracy rate of 70% and did not perform better than existing medical approaches.

Snapchat has teamed with Giphy to enable users to access animated GIF stickers and add them to Snaps, enabling users to resize and add multiple stickers to one post. Snapchat also plans to introduce tabs to its Friends and Discover sections, making it easier for users to organize content such as Discover subscriptions or group chats.

Gap brand President and CEO Jeff Kirwan has stepped down after three years and parent Gap Inc. has launched a search for a new chief, the company said Tuesday. Kirwan led efforts to create a more efficient supply chain and improve the fit and quality of its fashions.

Google followed through on promises to combine Android Pay and Google Wallet by releasing Google Pay in the Google Play store yesterday. Peer-to-peer payments are not available on this platform yet, but the company expects to offer this feature in the next few months.

Mylan's fixed-dose combination of dolutegravir, emtricitabine and tenofovir alafenamide pill received tentative approval from the FDA as a treatment for patients with HIV infection in developing countries.

The Federal Communications Commission on Thursday will publish an order to roll back net neutrality regulations, a source says. Congress would have 60 days to reverse the decision by passing a resolution.

Texas expects to get more than $1 billion in disaster-mitigation funds from the Federal Emergency Management Agency by the one-year anniversary of Hurricane Harvey, and $500 million is ready to be disbursed, Gov. Greg Abbott said. Harvey dropped more than 60 inches of rain in parts of southeast Texas after making landfall in August.

A report by the conservative group Freedom Partners says a 25-cent increase in the gas tax would cost drivers $103.39 a year in Washington, D.C., and $390.62 in Mississippi. President Donald Trump might support a gas tax increase as part of his infrastructure bill, but many conservative groups like Freedom Partners oppose the idea.

Smoking will join the gaming and drinking at an outdoor patio set to open in April at Live Casino & Hotel in Baltimore. The space, called Orchid, will be open on one side to allow patrons to light up, respecting a state law forbidding smoking inside casinos.